Index for books.



' No. 871,446- I Y PATENTED NOV. 19, 1907.

l/Vilma: v as mw. H. ROBERTSON.

INDEX FOR BOOKS.

APPLICATION FILED APR. 26, 1907.

F D O :21 86 7 WW T' v tn: mums PIYIR: cm. v/Avlmanm. o. c.

UNITED STATES PATENT OFFICE.

WILLIAM H. ROBERTSON, OF HECTOR, ARKANSAS.

INDEX FOR BOOKS.

Specification of Letters Patent.

Patented Nov. 19, 1907.

Application filed April 26. 1907. Serial No. 370.531-

T 0 allwhom it may concern:

Be itknown that 1, WILLIAM H. ROBERT- SON, a citizen of the UnitedStates, residing at Rector, in the county of Clay and State of Iinvention and opened at pages 86 and 87.

Fig. 2 is a detail view showing the alphabetical index and index-tabs,for a book having 180 pages. Fig. 3 is a plan view of the unittabs thatare secured to each third and fourth page. Fig. 4 is a plan view of theunit-tabs that are secured to each seventh and eighth page, and Fig. 5is a plan view of one of the decimal-tabs.

My invention has for its object to reduce the number of index-tabs, thetabs being so numbered and spaced that they will provide a simple andeflicient means for finding quickly'a particular page, whether such pageis with or without a tab.

An account or other book to which my invention is applied may have theusual alphabetical-index a, and beyond the column ofletters constitutingthe alphabetical index the pages are consecutively numbered. Throughoutthe book each leaf that carries the unit-numbers 3 and 4, as pages 23and 24., have attached near the upper margin of the page an index-tabI), having thereon unit-numbers 3 and 4, and below this series of tabsthe leaves having the unit-numbers 7 and 8; as pages 27 and 28, haveattached thereto index-tabs 0 having thereon numbers 7 and 8. p

The decimal-leaves, as pages 20, 30, 40 and so on, have attached totheir margins tabs (1, such tabs having the same numbers on each side,for instance on the leaf constituting pages 19 and 20; a tab bearing thefigures 22 would be attached, and the next tab which would be numbered33 will be secured to the-leaf numbered 29 on one side and 30 on theother side. WVhen the leaf numbered 99 and 100 is reached the tab willcarry the numbers 1010. The tabs (1 are attached to each consecutivetenth page and are arranged one below the other.

In use a person by reference to the alphabeticalindex ascertains thenumber of the page upon which the matter desired may be found, forinstance page 86, and by lifting the leaf carrying tab (Z numbered 8 thebook maybe opened at leaves 80 and 81, the tab a numbered 7 being raisedexposes the page numbered 86.

It will be noted that the leaves which bear the unit-numbers 1 and 2,and 5 and 6 are not provided with tabs of any character, the unit-tabsbeing only attached to pages which have thereon the unit-numbers 3 and4, and 7 and 8, and it will be observed that the tabs d, are carried bythe leaves which are numbered 9 and 0, as 79 and 80.

The manner of indexing set forth reduces the number of tabs, as thedecimal-tabs indicate the decimal-pages and the page'to the rightthereof, the first unit-tab 3, marks the third page and the second pageto its left, likewise the tab for the fourth page on the left hand sideof the book exposes page 5, page 6 is before the page bearing the tabnumbered 7, and the ninth page on the right hand side of the bookcarries the decimal-tab which indicates the ninth unit-page and thedecimal-page, and when the decimal-page is opened the first unit-pagewill be to its right.

This invention is especially applicable to ledgers and other accountbooks, though it is obvious that it may be applied to books generally.

Having thus set forth my invention, what I claim as new and desire tosecure by Letters Patent, is

An indexed book having numbered pages, consisting of a series ofunit-index-tabs attached to the upper portion of the vertical margin ofall the leaves that carry the numbers ending in 3 and 4, a like seriesof unitindex-tabs attached to the pages that carry numbers ending in 7and 8; such tabs being attached to their respective pages in a lineimmediately below the line of the tabs that are numbered 3 and 4:, and aseries of deeimal-index-tabs attached to the decimal pages,substantially as shown and for the purpose'set forth.

In testimony whereof I affix my signature in presence of two Witnesses.

WILLIAM H. ROBERTSON.

Witnesses:

G. A. MONIEL, J. N. MCNIEL.

